Question

我有以下问题

客户和客户每个客户都链接到特定客户

-ClientID，ClientName，Customer_custID

-CustomerID，客户名称

我想检索与特定客户相关的每个客户

这是我的尝试

     data=clients.select(c=>c.clientName, 
        c.customerName.where(f>f.customerID==f.customer_custID)

我知道这非常错，但我只是在学习lamda表达式和LINQ，所以请原谅我

Answer 1

试试这个：

IEnumerable<Client> clients = .... // your clients collection
IEnumerable<Customer> customers = .... // your customers collection

var relatedClients = from cst in customers
                     join cli in clients on cst.CustomerID equals cli.Customer_custID
                     where cst.CustomerID == 0 // your customerID
                     select cli;

Answer 2

我希望我能理解你想要的东西。它假定您在输入查询之前知道您要查找的客户ID。

var clientsQuery = from clients in Client
                   where clients.Customer_custId == customerId
                   select clients;

然后，您可以foreach查询结果。

foreach (var client in clientsQuery) 
{
    // Do stuff with your clients!
}

通过LINQ c＃检索数据

2 个答案: